Dec 3 Core 3 Geometry Basics

Front

What is a ray in geometry?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is a line in geometry?

Back

A line is a straight one-dimensional figure that has no thickness and extends infinitely in both directions.

Front

How is a plane named in geometry?

Back

A plane can be named by any three non-collinear points on the plane or by a single uppercase script letter.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How do you denote a line segment?

Back

A line segment is denoted by the endpoints with a line over the letters, e.g., AB.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What does collinear mean?

Back

Collinear points are points that lie on the same straight line.

Front

What is the symbol for a line?

Back

A line is denoted by two points with a line above them and arrows on both ends, e.g., ↔AB.